Add get_thread method to RealtimePublisher (#228)

---------

Signed-off-by: Patrick Roncagliolo <[email protected]>
Co-authored-by: Sai Kishor Kothakota <[email protected]>
Co-authored-by: Christoph Fröhlich <[email protected]>

Author: 3 people

include/realtime_tools/realtime_publisher.hpp

@@ -182,6 +182,10 @@ class RealtimePublisher
 #endif
   }
 
+  std::thread & get_thread() { return thread_; }
+
+  const std::thread & get_thread() const { return thread_; }
+
 private:
   // non-copyable
   RealtimePublisher(const RealtimePublisher &) = delete;